Scraper attachment for tractors



May 14, 1929.,

J. D. cuMMlNGs SCRAPER TTACHMENT FOR TRACTORS Filed April 22, 1927 2Sheets-Sheet l May 14, 1929. .1.13. CUMMINGS SCRAPER ATTACHMENT FORTHACTORS Filed April 22, 1927 2 Sheets-Sheet 2 rmsaal'may. 14,1923@lv joutras STATES PATENT ofi-Ij-FISJE;

Jamas D. commes, or noUsToN, TEXAS. j l

SCIEB ATTACHMENT FOB TRACTOE.

Application led April 22, 1927. Serial No. 185,710.

i the crank case thereof, ,in such manner as to allow dexiloility in theadjustment of the" atta'chment upon the tractor in use.

.du object is to rovide a universal engagement between tie scraper andthe ush bars so that the angle ot adjustment o the scraper may bechanged in various planes without diiliculty.

'lhe improvements in the present invention over the prior device,reterred to above, lie largely in details ot construction, whereby thescraper may be morehrmly sup-v ported and more readily adjusted..

lteterring to the drawings herewith, `torming a part .ot thisspeciiication, tor a more particular understanding o'l the invention,lclig. 1 is a hroken side elevation ot a tractor showing my inventionmounted thereon, certain parts being broken away 'tor `clearmess..`lilig. 2 is abroken rear view ot the scraper showing the means otattachment thereto oi the push bars. hig. 9 is a top plan' view ot theattachment removed, certain parts being broken away and removed.

"lhe scraper disclosed is designed to he employed to cut into a bank otearth and push the earth betere it. ln tiillingditches the earth ispushed toward the ditch and dumped therein. rlhe scraper 1 1s a plate otsteel ot suitable length, curved in vertical section to present aconcave tace torwardly lto engae the earth. "lhe lower edge ot the plateis sharpened at 2 to hotter out into the earth.

'lhe' late or mould board 1 is supported at the orward ends ol' A ushbars d, 9, which are themselves mounte The push bars are extendediorwardly trom a point directly below the crank case 5 ot the tractor.Plihe rear ends of the bars 3 vare secured within a casting 6 which hasupon the tractor d.,

diverging sockets in which the bar ends are secured.

The casting 6 has a central openin 7 8. Sgaid therein to receive anupright pin pm is supported within a bracket 9 bolted to the flange 10of the crank case. This mount ing furnishes an extremely ri'id and vhrmattachment at a point spaced forwardly from the drive wheels 11 of thetractor.

The arms 3 diverge forwardly andare of tubular formation. said armstelescope over :rods 12 which t slidably therein. Each of'said rods hasat: its forward end a ball 13 formed integral` with the rod. A radialflange 14 on the rod adjacent'the ball limits the movementv ot the rodinto the push bar arin. 'f

The push ars 3 are su ported adjacent their forward ends by yo res'15,as shown in my prior Patent hlo. 1,522,378, previously mentioned. rlFhesaid oke has two collars 16 termedA to receive t e push bar. El.bove thepush bar, the yoke is extended upwardly and has a slot 1l' therein,longitudinally ot the bar, to receive a crank arln 18, upon a lever 19,pivoted upon a rock shaft 20. rl"he said shai't is mounted pivotallywithin a bearing 21 bolted to the iorward side ot the trent aille 22 otthe tractor.

'llhe lever 19 is termed with a connecting arm 23 which joins with anarm 241- secured to shai't 29, the three arms 19, 23 and 2d beingpreferably termed in an integral triangular irame. 'lhe upper ends otarms `23 and 241 are pivotally connected to a link bar 25 extendingrearwardly tor control hy the operator in any preferred manner, theoperating connection being omitted. 'llhe crank arm 18 is slidable inthe slot 17 ot the yoke when the lever is operated.

lhere are supporting yo-kes 15 i'or each push bar and a transverse pin27 'through The forward ends ot the forward sleeve 16, the bar 3 and therod 12 serves to hold the rod in position in the bar. d. plurality ottransverse openings 28 are lformed therein to receive said pin 27 sothat the length ot each bar maybe thus varied, as hest seen 4in lig. 3.L lhe adjust able length. oi' the push rods makes the device adaptableto push the earth to the right, lett or forward in any de ree desired.

'lhe scraper plate 1 is ormed on its rearward side with a longitudinalslideway formed ci two spaced angle irons 29, having overhanging1flanges 30 toslidabl eni ave a bearin ythe scraper plate.

ock 31. The f orwarl face of -said block is curved to fit against thescraper and has a rearward socket 32 therein to receive the ball 13 uponthe push bar. There are bearing blocks 31 for each bar both slidable inthe slideway Vbetween the irons 29; The lower of the slideway guides hasspaced notches 33 therein and each block 31 has a ivoted latch'l dog 34thereon to ene wit a selected one of these notches to ho d the :blockfrom sliding during operation ofthe scraper.

At the upper edge-of the scraper 1s a rod 35 supported at each end inbrackets 36 upon the plate. Upon this rod are slidably mounted twosleeves 37 which have ears 38- thereon pivotally connected to theforward ends of arms 40. Said arms 40 extend rearwardly and areconnected to the yoke 15 at any one of a ,plurality of openings 41',thus furnishing a support for the upper side of The support arms aremade in two telescoping sections 40 and 40 similar to the push rods 3. Apin 42 servesl to retain the parts in the desired osition as do the `ins27 the push rods. hus when lthe pus rods a\re extended as shown in Fig.3 the support arms also are extended an appropriate amount.

In operation, the scraper Vwill most frequently be extended transverselyat approximately a right angle to the line of travel, as shown in fulllines in Fig. 3. The bearing blocks 31 will be locked in the proerposition to support the scraper plate at t at angle. This w1ll beaccomplished by dropping thellatching dogs 34 lnto any selected oneofthe notches 32, in the manner shown in Fig. 2. The connecting arms 40may be adjusted in any one of the o enin s 41 so as to tilt the scraperplate at t e deslred angle and ordinarily the position will beapproximately erect, as shown in Fig. 1.

lIn filling earth into ditches and trenches, as is necessary in thelaying of pipelines and the like, the lever 25 will be withdrawn towardthe operator so as to raise the scraper o'f the ground and the tractorwill then be backed up so as to bring the scraper against the wall ofearth which is to be moved `into the ditch. The operator will then dropthe scraper to the proper position to engage the bank of earth and thetractor will be advanced so as to push the earth into the ditch orexcavation which is to be filled. This operation will be repeated untilthe earth has been entirely lled into the ditch.

' When the device is to be used in scraping moreI to one side of thepath of the tractor. This inclining or tiltin of the scraper may be doneby removing t e pin 27 on the bar which is to be len thened andadvancing the rod 12 from within the bar so as toengage the pin withinone of the other openings 28. When thus adjusted, the plate will.y asfirmly supported as before and the universal connection between the rod12 and the bearing block upon the plate will allow the same firm contactbetween the push bar and the plate. In thus inclining the plate, it maybe necessary to slide one or both of the bearing blocks 31 within theslideway 29 so as to accommodate the change in the position of V liableto get out of order.

The advantages of the structure will'be obvious to those skilled in theart.

What I claim as new and desire to protect by Letters Patent is:

1. A scraper attachment for tractors including a scraper plate, pushbars therefor, a su porting bracket for said bars secured to the lbwerside of said tractor, rods adjustable longitudinally in the forward endsof said bars, slideways on the rearward side of said plate, bearingblocks slidable therein, and universal connections between said rods andsaid blocks.

2.'A scraper attachment for tractors including a scraper plate, pushbars therefor, a supporting bracket for said bars secured to the lowerside of said tractor, rods adjustable longitudinally in the forward endsof said bars, slideways on the rearward side of said plate, bearingvblocks slidable therein, universal connections between said rods andsaid blocks, and supporting arms slidably connected with the upper sideof said scraper plate for the pu ose described.

3. In a tractor aving a crank case, a front axle, and drive wheels, thecombination of an attachment including a scraper plate, a bracket onsaid crank case, a push bar casting secured to said bracket, push barssupported by said casting, the forward ends of said bars beingextensible, and a universal connection between said bars and saidscraper plate.

4.-. In a tractor having a crank case, a f ront axle, and drive wheels,the combinatlon of an attachment including a scraper plate, a bracket onsaid crank case, a push ar castlng secured to said bracket, push Ibarssupported by said casting, the forward ends of said bars beingextensible, a universal connection between said bars and said scraperplate, and means to raise and lower said bars and said scraper plate.

5. In a tractor having a crank case, a front axle, and drive wheels, thecombination of an attachment including a scraper plate, a bracket onsaid crank case, al push bar casting secured. to said bracket, push barssupported by said casting, the forward ends of said bars beingextensible, bearing blocks adjustable longitudinally o said plate and auniversal connection between said bars and said bearing blocks.

6. In a tractor including front and rear wheels, an attachment includinga scraper plate, push bars su ported on the under side of said tractorin ront of said rearwheels, bearing blocks connected with said bars andadjustable on said scraper plate, said push bars being extensible toallow adjustment of said plate, means to raise and lower said bars andplate, and adjustable means to support the upper edge of said plate.

7. In a tractor including front and rear wheels, an attachment includinga scra er plate, ush bars supported on the under s1de of said) tractorin front of said rear wheels, bearing blocks connected with said barsand adjustableon said scraper plate, said blocks having sockets therein,balls on said bars tting within said sockets said push bars vbeingextensible toallow a justment of said plate, means to raise and lowersaid bars and plate, and adjustable means to support the upper edge ofsaid plate.

8. A tractor attachment including push bars adapted to be supported attheir rear ends beneath said tractor, a scraper plate, longitudinalslideways on said plate, bearing blocks adjustable in said slideways,sockets in said blocks, rods adjustable in said bars,

balls on said rods engaging in said sockets, means to raise and lowersaid bars, and meansto support one edge of said plate.

9. A tractor attachment including a scraper plate, a plurality of p-ushbars connected with said tractor, universal connections between saidbars and said plate, and supports for the upper edge of said plate, saidbars and supports being adjustable longitudinally along said plate andalso in the direction of travel.

10. A tractor attachment including a scraper plate, a pair of divergingpush bars connected with said tractor, universal connections betweensaid bars and said plate, a rod secured at both ends along the upperside of said plate, and supports for the upper edge of said platesecured slidably on said rod, said bars and supports being adjustablelongitudinally along said plate for the purpose set forth.

In testimony whereof I hereunto atlx my signature this 16th day ofApril, A. D. 1927.

JAMES D. CUMMINGS.

